Mayfield Fund

Doctor Q&A site HealthTap has raised $24 million from Khosla Ventures, Mayfield Fund and Mohr Davidow Ventures. Former Square COO and new Khosla Ventures partner Keith Rabois is joining as a board member.

Ride sharing startup Zimride has raised its first substantial round of funding. On Wednesday the company, which allows people to arrange shared car rides together via the web and mobile apps, said it has raised $6 million in a Series A round led by Mayfield Fund.